Backrest insertion shell locking device and seat

Abstract

The utility model discloses a backrest inserting shell locking device and a seat, the backrest inserting shell locking device comprises an inserting shell, an inserting shell support and an inserting piece, and the inserting shell is used for being connected with a backrest; the plug shell support is hinged to the plug shell, and the plug shell support is provided with a clamping structure; the inserting piece is used for being connected with a seat frame, the inserting piece is inserted into the inserting shell, the inserting piece is provided with a first groove, and the inserting shell support rotates to drive the clamping structure to be inserted into the first groove so as to lock the positions of the inserting shell and the inserting piece. The inserting piece connected with the seat frame is inserted into the inserting shell connected with the backrest, the backrest is connected to the seat frame, the inserting shell support rotates relative to the inserting shell, the clamping structure on the inserting shell support is driven to be inserted into the first groove in the inserting piece, and therefore the positions of the inserting shell and the inserting piece are locked, and the backrest and the seat frame are prevented from being separated. And when the backrest and the seat frame are disassembled, the insertion shell bracket is rotated, so that the clamping structure is separated from the first groove, the position locking of the seat frame and the backrest is released, and the backrest and the seat frame are convenient to disassemble.

Description

Technical Field

[0001] This application relates to the field of functional seating technology, and in particular to a backrest insert locking device and a seating fixture. Background Technology

[0002] In current seating systems, the backrest insert and the seat plate are locked together using a flexible snap-fit ​​mechanism. The backrest insert has a flexible snap-fit, and the seat plate has corresponding perforations. When the seat plate is inserted into the backrest insert, the flexible snap-fit ​​gradually embeds into the perforations. Due to the snap-fit's elastic deformation capability, it locks itself within the perforations, thus locking the backrest insert and seat plate together.

[0003] However, the locking ability of the elastic sheet is weak. When the elastic sheet is subjected to reverse force, it is easy to come out, causing the backrest insert and the insert to separate from each other. Utility Model Content

[0004] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a backrest insert locking device, which can lock the position of the insert and the insert piece by rotating the insert bracket.

[0005] This application also proposes a seat having the aforementioned backrest insert locking device.

[0006] According to a first aspect embodiment of the present application, the backrest insert locking device includes an insert, an insert bracket, and an insert piece. The insert is used to connect to the backrest; the insert bracket is hinged to the insert and has a snap-fit ​​structure; the insert piece is used to connect to the seat frame and is inserted into the insert. The insert piece has a first groove, and the insert bracket rotates to drive the snap-fit ​​structure into the first groove to lock the positions of the insert and the insert piece.

[0007] The backrest insert locking device according to the embodiments of this application has at least the following beneficial effects: the insert connecting the seat frame is inserted into the insert connecting the backrest, so that the backrest is connected to the seat frame, the insert bracket rotates relative to the insert, and drives the snap-fit ​​structure on the insert bracket to insert into the first groove on the insert, thereby locking the position of the insert and the insert and preventing the backrest and the seat frame from separating; when disassembling the backrest and the seat frame, the insert bracket is rotated to disengage the snap-fit ​​structure from the first groove, the position lock of the seat frame and the backrest is released, and the disassembly of the backrest and the seat frame is facilitated.

[0008] According to some embodiments of this application, the insert bracket is provided with an embedding structure, the insert piece is provided with a second groove, and the insert bracket drives the embedding structure to embed into the second groove by rotation, so as to lock the position of the insert and the insert piece.

[0009] According to some embodiments of this application, the insert bracket is provided with a limiting structure that extends toward the insert; when the limiting structure rotates and abuts against the insert, the snap-fit ​​structure disengages from the first groove and the embedding structure disengages from the second groove; when there is a gap between the limiting structure and the insert, the snap-fit ​​structure is inserted into the first groove and the embedding structure is embedded into the second groove.

[0010] According to some embodiments of this application, the insert shell is provided with a first limiting post, the insert shell bracket is provided with a first limiting groove, and the first limiting post slides within the range of the first limiting groove; and / or, the insert shell is provided with a second limiting groove, the insert shell bracket is provided with a second limiting post, and the second limiting post slides within the range of the second limiting groove.

[0011] According to some embodiments of this application, the insert bracket includes a hinge portion, a transition portion, and a locking portion. The hinge portion is hinged to the insert shell. The embedded structure is an embedded plate bent at the edge of the locking portion. The transition portion is used to connect the hinge portion and the locking portion. The width dimension of the transition portion gradually increases in the direction away from the hinge portion to increase the width dimension of the locking portion.

[0012] According to some embodiments of this application, the snap-fit ​​structure is a snap-fit ​​plate, which is bent at the end of the locking portion.

[0013] According to some embodiments of this application, the insert housing is provided with a hinge structure extending to the outside, and the insert housing support and the hinge structure are hinged by rivets.

[0014] According to some embodiments of this application, the rivet can apply a preload to the hinge structure and the insert bracket to limit the rotational torque of the insert bracket to more than 20N.

[0015] According to some embodiments of this application, a gasket is provided between the hinge structure and the insert bracket, and the sum of the thicknesses of the hinge structure and the gasket is less than the thickness of the insert.

[0016] According to some embodiments of this application, the insert shell includes a base and a bent portion disposed on the edge of the base. The bent portion forms a slot by bending, and the insert piece is inserted into the insert shell through the slot. The base is attached to the surface of the insert piece. The edge of the bent portion forms an inclined guide portion by bending.

[0017] According to some embodiments of this application, the insert bracket is provided with a clamping operation structure, the clamping operation structure is attached to the surface of the insert, and the clamping operation structure and the base clamp the insert.

[0018] According to some embodiments of this application, the clamping operation structure includes a first connecting part, an extension part, a second connecting part, and a clamping part connected in sequence. The extension part and the clamping part both extend in the direction of the insert, and the clamping part is attached to the surface of the insert.

[0019] According to some embodiments of this application, the clamping operation structure further includes a third connecting part and an operating part, wherein the operating part is connected to the clamping part through the third connecting part, and the operating part extends in a direction away from the insert.

[0020] According to some embodiments of this application, the surface of the first connecting portion is provided with a reinforcing groove, and the first connecting portion forms an indentation at the location of the reinforcing groove.

[0021] According to a second aspect embodiment of this application, the seat includes a backrest, a seat frame, and the aforementioned backrest insert locking device, wherein the backrest is connected to the seat frame via the backrest insert locking device.

[0022] The seating according to the embodiments of this application has at least the following beneficial effects: the backrest insert locking device of the first aspect embodiment of this application includes an insert, an insert bracket and an insert piece. The insert piece connecting the seat frame is inserted into the insert connecting the backrest, so that the backrest is connected to the seat frame. The insert bracket rotates relative to the insert and drives the snap-fit ​​structure on the insert bracket to insert into the first groove on the insert piece, thereby locking the position of the insert and the insert piece and preventing the backrest and the seat frame from separating. When disassembling the backrest and the seat frame, the insert bracket is rotated to disengage the snap-fit ​​structure from the first groove, and the position lock of the seat frame and the backrest is released, which facilitates the disassembly of the backrest and the seat frame.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] The present application will be further illustrated below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments illustrated in the following drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

[0025] Figure 1 This is a schematic diagram of the backrest insert locking device according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the backrest insert locking device according to an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the insert plate in the backrest insert locking device according to an embodiment of this application;

[0028] Figure 4This is a schematic diagram of the embedded structure and the second groove cooperating in the backrest insert locking device according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the limiting structure in the first embodiment of this application;

[0030] Figure 6 This is a side view of the limiting structure in the first embodiment of this application;

[0031] Figure 7 This is the first embodiment of this application. Figure 6 A magnified view of part C in the middle;

[0032] Figure 8 This is a schematic diagram of the limiting structure in the second embodiment of this application;

[0033] Figure 9 This is the second embodiment of this application. Figure 8 A magnified view of part A in the middle;

[0034] Figure 10 This is a schematic diagram of the limiting structure in the third embodiment of this application;

[0035] Figure 11 This is the third embodiment of this application. Figure 10 A magnified view of part B in the middle section;

[0036] Figure 12 This is a front view of the insert bracket in the backrest insert locking device according to an embodiment of this application;

[0037] Figure 13 This is a schematic diagram of the structure of the insert shell bracket in the backrest insert shell locking device according to an embodiment of this application;

[0038] Figure 14 This is a rear view of the insert bracket in the backrest insert locking device according to an embodiment of this application;

[0039] Figure 15 This is a schematic diagram of the structure of the insert shell in the backrest insert shell locking device according to an embodiment of this application;

[0040] Figure 16 This is a schematic diagram of the clamping operation structure in the backrest insert locking device of this application embodiment.

[0041] Figure label:

[0042] Insertion housing bracket 100; hinge portion 1001; transition portion 1002; locking portion 1003; snap-fit ​​structure 101; embedding structure 102; clamping operation structure 103; first connecting portion 1031; extension portion 1032; second connecting portion 1033; clamping portion 1034; third connecting portion 1035; operation portion 1036; reinforcing groove 1037;

[0043] Insert shell 200; hinge structure 201; rivet 202; washer 203; base body 204; bending part 205; guide part 206;

[0044] Insert 300; First slot 301; Second slot 302;

[0045] Limiting structure 401; first limiting post 402; first limiting groove 403; second limiting groove 404; second limiting post 405; gap 406. Detailed Implementation

[0046] The embodiments of this application are described in detail below with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0047] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "width direction", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0049] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] This application provides a backrest insert locking device, which includes an insert 200, an insert bracket 100, and an insert plate 300.

[0052] Among them, such as Figure 1 and Figure 2 As shown, the insert 300 is inserted into the interior of the housing 200, thereby achieving a detachable connection between the insert 300 and the housing 200. Furthermore, the housing 200 and the housing support 100 are hinged, and during the relative rotation of the housing 200 and the housing support 100, the housing support 100 can move closer to or further away from the insert 300.

[0053] After the insert 300 is inserted into the housing 200, if the housing bracket 100 rotates to abut the insert 300, the housing bracket 100 locks the relative position of the housing 200 and the insert 300, keeping the housing 200 and the insert 300 in an inserted relationship and preventing them from separating. If the housing bracket 100 rotates to disengage from the insert 300, the locking of the relative position of the housing 200 and the insert 300 by the housing bracket 100 is released, and at this time, the housing 200 and the insert 300 can be disassembled.

[0054] Specifically, the insert 200 is used to connect the backrest of the seat, and the insert 300 is used to connect the seat frame of the seat. Therefore, when the insert bracket 100 rotates to abut the insert 300, the backrest and the seat frame can remain connected to each other; when the insert bracket 100 rotates to disengage from the insert 300, the backrest and the seat frame can be disassembled.

[0055] In traditional seating, the insert 200 for connecting the backrest and the insert 300 for connecting the seat frame are locked together by a spring clip. However, the spring clip has a weak locking ability, and when the spring clip is subjected to reverse force, it is easy to come out, causing the backrest insert 200 and the insert 300 to separate from each other.

[0056] The backrest insert locking device of this application can lock the relative positions of the insert 200 and the insert piece 300 by rotating the insert bracket 100, eliminating the need for a flexible thin-plate snap-fit ​​connection method, thereby ensuring the connection strength between the backrest and the seat frame and preventing separation of the backrest and the seat frame. At the same time, the backrest insert locking device of this application can also release the position lock of the insert 200 and the insert piece 300 by rotating the insert bracket 100, thereby ensuring that the backrest and the seat frame can be disassembled according to actual needs, simplifying the connection and disassembly process of the backrest and the seat frame.

[0057] The contents of this application are described in detail below with reference to specific embodiments. It should be noted that the following description is merely illustrative and not a specific limitation of this application.

[0058] In some examples, the insert 200 is used to connect to the backrest, and the insert 200 is generally formed as a plate-like structure. One end of the plate-like insert 200 is used to insert into the backrest, and the other end of the insert 200 is used to connect to the insert plate 300.

[0059] Specifically, the length of the insert 200 is defined by the end for insertion into the backrest and the other end for connecting the insert 300. The width of the end of the insert 200 for insertion into the backrest is smaller than the width of the other end for connecting the insert 300; that is, the width of the insert 200 gradually increases from the end inserted into the backrest to the end connecting the insert 300. This facilitates both insertion of the insert 200 into the backrest and insertion of the insert 300 into the insert 200.

[0060] Furthermore, since the insert bracket 100 is hinged to the insert shell 200, the insert bracket 100 can rotate relative to the insert shell 200. Because the insert shell 200 needs to be inserted into a backrest with a relatively fixed position, the rotation of the insert bracket 100 relative to the insert shell 200 is manifested as the rotation of the insert bracket 100 itself.

[0061] Specifically, the insert bracket 100 is generally formed as a rod-shaped structure, and the insert shell 200 is hinged to the insert bracket 100 at its end. When the insert bracket 100 rotates, the end of the insert bracket 100 facing away from the hinged position will gradually move away from the insert shell 200 or gradually move closer to the insert shell 200. Since the insert shell 200 and the insert piece 300 are inserted together, if the insert bracket 100 moves closer to the insert shell 200 by rotating, the insert bracket 100 also gradually moves closer to the insert piece 300, thereby locking the relative positions of the insert shell 200 and the insert piece 300; if the insert bracket 100 moves away from the insert shell 200 by rotating, the insert bracket 100 also gradually moves away from the insert piece 300, thereby releasing the locking of the insert shell 200 and the insert piece 300.

[0062] The insert bracket 100 is provided with a snap-fit ​​structure 101, and the insert bracket 100 abuts against the insert piece 300 through the snap-fit ​​structure 101 to lock the positions of the insert 200 and the insert piece 300.

[0063] Furthermore, such as Figure 3 As shown, the insert 300 is used to connect the seat frame. The insert 300 is generally formed into a plate-like structure, and the shape of the insert 300 corresponds to that of the insert housing 200. One end of the plate-like insert 300 is used to insert into the insert housing 200, and the other end of the insert 300 is used to connect to the seat frame.

[0064] Specifically, the length direction of the insert 300 is defined by one end for inserting into the housing 200 and the other end for connecting to the seat frame. To facilitate insertion of the insert 300 into the housing 200 and to ensure that the shape of the insert 300 conforms to the shape of the housing 200, the width of the end of the insert 300 for inserting into the housing 200 gradually decreases. Meanwhile, the shape of the other end of the insert 300 for connecting to the seat frame can be set according to the specific structure of the seat frame.

[0065] It is worth noting that the insert 300 is provided with a first groove 301. The shape and position of the first groove 301 are determined according to the shape and position of the snap-fit ​​structure 101, ensuring that the snap-fit ​​structure 101 can be inserted into the first groove 301 and abut against the bottom of the first groove 301 under the rotation of the insert housing bracket 100. Under the snap-fit ​​action of the first groove 301 and the snap-fit ​​structure 101, the insert housing 200 and the insert 300 can be locked in position, thereby ensuring that the backrest is locked to the seat frame and preventing accidental separation of the backrest and the seat frame.

[0066] Specifically, the insert bracket 100 with a snap-fit ​​structure 101 is hinged to the edge of the insert 200, and the first groove 301 is provided at the edge of the insert 300 to facilitate the positional correspondence between the snap-fit ​​structure 101 and the first groove 301. In addition, the snap-fit ​​structure 101 is formed as a sheet-like structure, and the edge of the sheet-like snap-fit ​​structure 101 abuts against the bottom of the first groove 301, thereby achieving snap-fit.

[0067] Simultaneously, as the housing bracket 100 rotates, the movement path of the snap-fit ​​structure 101 is arc-shaped. To facilitate the snap-fit ​​structure 101's smooth insertion into the first groove 301, the width of the opening portion of the first groove 301 is greater than the width of the bottom portion of the first groove 301; that is, the width of the first groove 301 gradually increases from the bottom to the opening portion. The opening portion of the first groove 301 with the larger width is used to receive the snap-fit ​​structure 101, while the bottom portion of the first groove 301 with the smaller width is used to lock the position of the snap-fit ​​structure 101.

[0068] In some examples, such as Figure 4As shown, the insert bracket 100 is provided with an embedding structure 102, which is disposed on the side of the insert bracket 100 near the insert piece 300.

[0069] When the housing bracket 100 rotates, it drives the embedded structure 102 to rotate at the same amplitude. During rotation, the embedded structure 102 gradually approaches the insert 300 until it contacts the insert 300, thereby locking the relative positions of the housing 200 and the insert 300. Similarly, during rotation, the embedded structure 102 gradually moves away from the insert 300 until it detaches from the insert 300, thereby releasing the position lock of the housing 200 and the insert 300.

[0070] Furthermore, the insert 300 is provided with a second groove 302, which is also located at the edge of the insert 300. The second groove 302 is arranged side by side with the first groove 301, and there is a certain distance between them. Similar to the working principle of the snap-fit ​​structure 101 and the first groove 301, as the insert structure 102 rotates with the insert housing bracket 100, the insert structure 102 will gradually insert into the second groove 302 or disengage from the second groove 302. It can be understood that when the insert structure 102 is inserted into the second groove 302, the insert housing 200 and the insert 300 are locked in position; when the insert structure 102 disengages from the second groove 302, the position lock of the insert housing 200 and the insert 300 is released.

[0071] Specifically, the embedded structure 102 is formed as a sheet-like structure. When the embedded structure 102 is inserted into the second groove 302 and reaches the rotation limit position, the entire sheet-like embedded structure 102 is within the range of the second groove 302. At this time, the plate surface of the embedded structure 102 forms a surface contact with the bottom of the second groove 302 with a large contact area, thereby locking the relative position of the insert shell 200 and the insert piece 300.

[0072] Understandably, during the process of locking the relative positions of the housing 200 and the insert 300, the snap-fit ​​structure 101 abuts against the bottom of the first groove 301 through its edge, while the embedded structure 102 abuts against the bottom of the second groove 302 through its plate surface. Since the plate surface of the embedded structure 102 occupies more space than the edge of the snap-fit ​​structure 101, the width of the second groove 302 is greater than the width of the first groove 301.

[0073] In this configuration, where a snap-fit ​​structure 101 and a first groove 301 are provided between the insert bracket 100 and the insert piece 300, an embedding structure 102 and a second groove 302 are also provided between them. On one hand, the surface of the embedding structure 102 forms a surface contact with the bottom of the second groove 302, which improves the stability when the insert bracket 100 and the insert piece 300 are in contact. On the other hand, when the snap-fit ​​structure 101 and the first groove 301 fail to engage, the embedding structure 102 can still abut against the bottom of the second groove 302, thereby ensuring the engagement of the insert bracket 100 and the insert piece 300.

[0074] In addition, as the insert bracket 100 rotates, the movement path of the embedded structure 102 is arc-shaped. In order to facilitate the embedded structure 102 to smoothly enter the second groove 302, the width of the opening of the second groove 302 is greater than the width of the bottom of the second groove 302, that is, the width of the second groove 302 gradually increases from the bottom to the opening.

[0075] It is worth noting that the snap-fit ​​structure 101, in conjunction with the first groove 301, and the embedding structure 102, in conjunction with the second groove 302, are both used to lock the relative positions of the insert shell 200 and the insert piece 300. Therefore, the backrest insert shell locking device may only have the snap-fit ​​structure 101 and the first groove 301, or only have the embedding structure 102 and the second groove 302, or the backrest insert shell locking device may have both the snap-fit ​​structure 101 and the first groove 301, as well as the embedding structure 102 and the second groove 302.

[0076] In some examples, a limiting structure 401 is provided between the insert bracket 100 and the insert 200. The limiting structure 401 is used to limit the rotational stroke of the insert bracket 100 relative to the insert 200. While ensuring that the insert bracket 100 can achieve position locking between the insert 200 and the insert 300, reducing the rotational stroke of the insert bracket 100 can reduce unnecessary user operations and improve the user experience.

[0077] Under the limiting effect of the limiting structure 401, when the insert bracket 100 reaches the limit position of forward rotation, the locking structure 101 abuts against the bottom of the first groove 301, and the embedding structure 102 abuts against the bottom of the second groove 302, thereby locking the position of the insert 200 and the insert 300; when the insert bracket 100 reaches the limit position of reverse rotation, the locking structure 101 completely disengages from the range of the first groove 301, and the embedding structure 102 also completely disengages from the range of the second groove 302, thereby releasing the position locking of the insert 200 and the insert 300.

[0078] In the first embodiment, as Figure 5As shown, the limiting structure 401 is disposed on the insert bracket 100 and is located at the end of the insert bracket 100. The limiting structure 401 can limit the extreme position of the reverse rotation of the insert bracket 100.

[0079] Specifically, such as Figure 6 and Figure 7 As shown, when the insert bracket 100 rotates in the reverse direction, it also drives the limiting structure 401 to rotate by the same amplitude. The gap 406 between the limiting structure 401 and the insert 200 gradually decreases until the limiting structure 401 abuts against the insert 200. It can be understood that because the limiting structure 401 abuts against the insert 200, structural interference is formed between the limiting structure 401 and the insert 200, thus the insert bracket 100 can no longer continue to rotate in the reverse direction, reaching its limit position for reverse rotation. At this point, the snap-fit ​​structure 101 has completely disengaged from the first groove 301, and the embedding structure 102 has also completely disengaged from the second groove 302, releasing the lock between the insert 200 and the insert piece 300.

[0080] Simultaneously, when the insert bracket 100 rotates forward, the limiting structure 401 gradually moves away from the insert 200 as the insert bracket 100 rotates, thus forming a gap 406 between the limiting structure 401 and the insert 200. Therefore, the limiting structure 401 does not limit the forward rotation of the insert bracket 100. When the snap-fit ​​structure 101 contacts the bottom of the first groove 301 and the embedding structure 102 contacts the bottom of the second groove 302, the insert bracket 100 reaches the limit position of forward rotation.

[0081] In the second embodiment, as Figure 8 and Figure 9 As shown, the insert 200 is provided with a first limiting post 402, and the insert bracket 100 is provided with a first limiting groove 403. The first limiting post 402 and the first limiting groove 403 cooperate with each other to limit the extreme position of the rotation of the insert bracket 100.

[0082] The width of the first limiting groove 403 is set according to the size of the first limiting post 402. The first limiting post 402 is inserted into the first limiting groove 403 and slides within the range of the first limiting groove 403. It can be understood that the shape of the first limiting groove 403 needs to match the relative movement path of the first limiting post 402. Since the insert bracket 100 and the insert 200 rotate relative to each other, the first limiting post 402 and the insert bracket 100 also rotate relative to each other. Therefore, the first limiting groove 403 is an arc-shaped groove structure.

[0083] It is worth noting that the first limiting post 402 and the first limiting groove 403 at least define the extreme positions of the reverse rotation of the insert bracket 100. During the rotation of the insert bracket 100, when the first limiting post 402 abuts against the first end of the first limiting groove 403, the insert bracket 100 reaches the extreme position of the reverse rotation.

[0084] It is understandable that the first limiting post 402 and the first limiting groove 403, after limiting the extreme position of the reverse rotation of the insert bracket 100, can also limit the extreme position of the forward rotation of the insert bracket 100. When the first limiting post 402 abuts against the second end of the first limiting groove 403, the insert bracket 100 reaches the extreme position of forward rotation. If the first limiting post 402 and the first limiting groove 403 do not limit the forward rotation of the insert bracket 100, when the snap-fit ​​structure 101 abuts against the bottom of the first groove 301 and the embedding structure 102 abuts against the bottom of the second groove 302, the insert bracket 100 reaches the extreme position of forward rotation.

[0085] In the third embodiment, as Figure 10 and Figure 11 As shown, the insert bracket 100 is provided with a second limiting post 405, and the insert 200 is provided with a second limiting groove 404. The second limiting post 405 and the second limiting groove 404 cooperate with each other to limit the extreme position of the rotation of the insert bracket 100.

[0086] The width of the second limiting groove 404 is set according to the size of the second limiting post 405. The second limiting post 405 is inserted into the second limiting groove 404 and slides within the range of the second limiting groove 404. The shape of the second limiting groove 404 needs to match the relative movement path of the second limiting post 405, therefore the second limiting groove 404 is an arc-shaped groove structure.

[0087] It is worth noting that the second limiting post 405 and the second limiting groove 404 at least define the extreme positions of the reverse rotation of the housing bracket 100. When the second limiting post 405 abuts against the first end of the second limiting groove 404, the housing bracket 100 reaches the extreme position of reverse rotation.

[0088] It is understandable that the second limiting post 405 and the second limiting groove 404, after limiting the extreme position of the reverse rotation of the insert bracket 100, can also limit the extreme position of the forward rotation of the insert bracket 100. When the second limiting post 405 abuts against the second end of the second limiting groove 404, the insert bracket 100 reaches the extreme position of forward rotation. If the second limiting post 405 and the second limiting groove 404 do not limit the forward rotation of the insert bracket 100, when the snap-fit ​​structure 101 abuts against the bottom of the first groove 301 and the embedding structure 102 abuts against the bottom of the second groove 302, the insert bracket 100 reaches the extreme position of forward rotation.

[0089] In some examples, such as Figure 12 , Figure 13 and Figure 14 As shown, the housing bracket 100 includes a hinge portion 1001, a transition portion 1002, and a locking portion 1003. The hinge portion 1001 and the locking portion 1003 form opposite ends of the housing bracket 100. The transition portion 1002 is located between the hinge portion 1001 and the locking portion 1003 and is used to connect the hinge portion 1001 and the locking portion 1003.

[0090] Furthermore, the hinge portion 1001 is used to hinge with the insert housing 200, and the locking portion 1003 is used to provide the snap-fit ​​structure 101 and the embedding structure 102. It can be understood that the limiting structure 401 in the first embodiment is provided at the end of the hinge portion 1001, the first limiting groove 403 in the second embodiment is provided in the hinge portion 1001, and the second limiting post 405 in the third embodiment is provided in the hinge portion 1001.

[0091] Specifically, the insert bracket 100 is a rod-shaped structure formed by bending a piece of sheet metal. The embedding structure 102 is formed by bending a piece of sheet metal extending from the edge of the locking portion 1003 to the outside, thus forming an embedding plate. Simultaneously, the snap-fit ​​structure 101 is disposed at the end of the locking portion 1003 and is formed by bending a piece of sheet metal extending from the end of the locking portion 1003 to the outside, thus forming a snap-fit ​​plate.

[0092] It is worth noting that, on the one hand, the transition portion 1002 is used to connect the hinge portion 1001 and the locking portion 1003; on the other hand, the transition portion 1002 serves as a size transition between the hinge portion 1001 and the locking portion 1003, which have different dimensions. Specifically, the width of the hinge portion 1001 is smaller than the width of the locking portion 1003. To facilitate the connection between the hinge portion 1001 and the locking portion 1003, the transition portion 1002 gradually increases in size in the direction away from the hinge portion 1001. Here, the width direction of the insert bracket 100 is... Figure 12 The X-axis direction in the diagram can be understood as the length direction of the insert bracket 100. Figure 12 The Y-axis direction in the diagram.

[0093] Since the embedded structure 102 is disposed on the locking part 1003, the locking part 1003 has a large width dimension, which can reserve a large installation space for the embedded structure 102, thereby facilitating the increase of the size of the embedded structure 102 in the width direction. Furthermore, as the size of the embedded structure 102 in the width direction increases, when the embedded structure 102 abuts against the bottom of the second groove 302, the plate surface of the embedded structure 102 can completely cover the bottom area of ​​the second groove 302, so that the embedded structure 102 and the bottom of the second groove 302 form a large contact area, which is beneficial to the position locking of the insert 200 and the insert 300.

[0094] In some examples, such as Figure 15 As shown, the insert shell 200 is provided with a hinge structure 201, and the hinge structure 201 is disposed on the edge of the insert shell 200. The hinge structure 201 and the hinge part 1001 form a hinged connection, thereby ensuring the rotational connection between the insert shell 200 and the insert shell support 100.

[0095] Furthermore, the hinge structure 201 is formed as a sheet structure. When the insert shell 200 is made of sheet metal, the hinge structure 201 is the part of the sheet metal that extends out of the edge of the insert shell 200. That is, the hinge structure 201 and the insert shell 200 are a whole, and there is no need to connect the two.

[0096] Furthermore, the hinge portion 1001 of the insert bracket 100 and the hinge structure 201 of the insert shell 200 are hinged together by fasteners. Specifically, the hinge portion 1001 has insertion holes, and the hinge structure 201 also has insertion holes. The insertion holes on the hinge portion 1001 and the insertion holes on the hinge structure 201 mate with each other, thereby forming a channel for fastener insertion. Meanwhile, the fasteners can be components such as rivets 202. When rivets 202 are used, the rivets 202 pass through both insertion holes sequentially and remain inside both insertion holes at all times. In this case, the insert bracket 100 and the insert shell 200 are hinged together by the rivets 202.

[0097] In some examples, to ensure that the rivet 202 is always connected between the insert housing 200 and the insert housing support 100, both ends of the rivet 202 are provided with abutment portions larger than the insertion hole. In this case, the rivet 202 has two functions: first, the rivet 202 can ensure the hinge connection between the insert housing 200 and the insert housing support 100; second, the rivet 202 can apply a preload force to the insert housing 200 and the insert housing support 100 through the abutment portions. Here, the preload force is manifested as the abutment portions at both ends of the rivet 202 clamping the insert housing 200 and the insert housing support 100.

[0098] Understandably, if there is no preload between the housing 200 and the housing bracket 100, when the user rotates the housing bracket 100 in the opposite direction to release the position lock of the housing 200 and the housing bracket 100, the housing bracket 100 is unlikely to maintain its position after the reverse rotation. Therefore, the locking structure 101 can only temporarily disengage from the first slot 301, and the embedding structure 102 can only temporarily disengage from the second slot 302. As the user's hand no longer applies rotational force to the housing bracket 100, the housing bracket 100 will rotate forward under its own gravity, causing the locking structure 101 and the embedding structure 102 to re-enter the first slot 301 and the second slot 302, thus re-locking the positions of the housing 200 and the housing bracket 100, increasing the difficulty of operation for the user.

[0099] The rivet 202 of this application can apply a preload to the insert housing 200 and the insert housing bracket 100. Specifically, the preload applied by the rivet 202 can limit the rotational torque of the insert housing bracket 100 to more than 20N. That is, the user needs to apply a force greater than 20N to the insert housing bracket 100 to drive it to rotate in the forward or reverse direction. If the rotational torque of the insert housing bracket 100 is less than 20N, the insert housing bracket 100 will remain in its current position and will not rotate on its own due to its own weight.

[0100] Therefore, when the user rotates the housing bracket 100 in the opposite direction to release the position lock of the housing 200 and the housing bracket 100, the housing bracket 100 can maintain the position after the reverse rotation. The snap-fit ​​structure 101 remains in the position away from the first groove 301, and the embedded structure 102 also remains in the position away from the second groove 302, reducing the user's operating difficulty.

[0101] In some examples, because the rivet 202 applies a preload to the housing 200 and the housing bracket 100, if there are no other components between them, the housing 200 and the housing bracket 100 will form a tight contact. In this case, the rotation of the housing bracket 100 relative to the housing 200 will result in significant sliding friction between the two housings. This friction will cause the housing bracket 100 to rotate poorly, hindering user operation, and may also structurally damage the housing 200 and the housing bracket 100. Furthermore, the generation of sliding friction may also cause noise during the rotation of the housing bracket 100.

[0102] Therefore, a gasket 203 is provided between the insert housing 200 and the insert housing support 100 in this application. It is understood that the gasket 203 is disposed between the hinge structure 201 and the hinge portion 1001. When the insert housing support 100 rotates, friction exists between the insert housing 200 and the gasket 203, and also between the insert housing support 100 and the gasket 203, thereby preventing sliding friction between the insert housing 200 and the insert housing support 100.

[0103] Specifically, the gasket 203 can be made of flexible materials such as rubber to ensure the wear resistance of the gasket 203 and also to help reduce noise.

[0104] Furthermore, in the first embodiment, the limiting structure 401 located at the end of the hinge portion 1001 needs to abut against the insert shell 200 to limit the reverse rotation of the insert shell support 100. To ensure that the limiting structure 401 can interfere with the side edge of the insert shell 200 at its extreme position, the sum of the thicknesses of the hinge structure 201 and the gasket 203 is less than the thickness of the insert shell 200, thus avoiding the limiting structure 401 failing to abut against the insert shell 200 due to excessive thickness of the gasket 203.

[0105] In some examples, such as Figure 15 As shown, the insert shell 200 includes a base 204 and a bent portion 205, with the bent portion 205 located at the side edge of the base 204. When the insert shell 200 is made of sheet metal, the side edge of the sheet metal is bent to form the bent portion 205. It is understood that when bending the side edge of the sheet metal, a portion of the solid structure that is not bent needs to be left at the side edge; this portion of the solid structure is the hinge structure 201.

[0106] Furthermore, during the bending process, the bent portion 205 needs to extend towards the center of the insert shell 200, thereby forming a slot on the side edge of the insert shell 200. It can be understood that the insert shell 200 and the insert piece 300 are connected via the slot. When the insert piece 300 is inserted into the insert shell 200, the side edge of the insert piece 300 slides within the slot, while the base 204 of the insert shell 200 is located on the outer side of one side of the insert piece 300.

[0107] Furthermore, the width of the slot corresponds to the thickness of the insert 300, and the spacing between the slots on both sides of the housing 200 corresponds to the width of the insert 300, thus the slots can define the position of the insert 300. When the insert 300 is fully inserted into the housing 200, the base 204 of the housing 200 fits against one side of the insert 300, preventing the insert 300 from wobbling inside the housing 200.

[0108] In some examples, the bend 205 is inclined to the base 204, such that the width of the slot formed by the bend 205 at the edge of the housing 200 is a variable value.

[0109] Specifically, the width at the bottom of the slot is less than the width at the slot opening. The width at the slot opening is greater than the thickness of the insert 300, while the width at the bottom of the slot is approximately equal to the thickness of the insert 300.

[0110] During the insertion of the insert 300 into the housing 200, when the insert 300 is not fully inserted into the housing 200, the widths of the insert 300 and housing 200 vary at different positions along their length, and their widths are not yet perfectly aligned. At this time, there is still a certain distance between the side edge of the insert 300 and the bottom of the slot. Therefore, the side edge of the insert 300 is located at the wider part of the slot, which facilitates the initial alignment of the insert 300 with the slot and reduces the installation difficulty of the insert 300 and housing 200.

[0111] When the insert 300 is fully inserted into the housing 200, the widths of the insert 300 and the housing 200 correspond. At this time, the side edge of the insert 300 touches the bottom of the slot, and the side edge of the insert 300 is finally inserted into the bottom of the slot, thus completing the insertion and installation process between the insert 300 and the housing 200.

[0112] In some examples, the bent portion 205 is also provided with a guide portion 206, which is disposed at the edge of the bent portion 205. When the housing 200 is made of sheet metal, the bent portion 205 is formed by bending the edge of the sheet metal, and the guide portion 206 is formed by further bending the edge portion of the bent portion 205.

[0113] The guide portion 206 is inclined to the bending portion 205, thereby further increasing the width of the slot at the bending portion 205. It can be understood that the further increase in the width of the slot opening position is more conducive to the initial alignment of the insert 300 with the slot, making it easier for the user to operate.

[0114] Meanwhile, the bend junction of the guide portion 206 and the bend portion 205 also has a certain inclination angle, so that the opening width of the guide portion 206 towards the slot expands towards the insert 300. During the process of inserting the side edge of the insert 300 into the slot, the insert 300 can smoothly correspond to the slot defined by the bend portion 205 through the guiding action of the guide portion 206.

[0115] In some examples, such as Figure 16 As shown, the insert bracket 100 is provided with a clamping operation structure 103. On the one hand, the clamping operation structure 103 makes it easy for the user to rotate the insert bracket 100; on the other hand, when the insert bracket 100 is rotated to its limit position in the forward direction, the clamping operation structure 103 can cooperate with the insert 200 to stabilize the position of the insert piece 300.

[0116] Furthermore, the clamping operation structure 103 is formed as a curved sheet structure. When the insert bracket 100 is made of sheet metal, the base of the clamping operation structure 103 is the sheet metal part located on the side edge of the insert bracket 100. This part of the sheet metal is bent to form the clamping operation structure 103.

[0117] The clamping operation structure 103 bends towards the insert 300. When the insert housing support 100 rotates to its maximum position, the clamping operation structure 103 engages with the plate surface of the insert 300, thus forming a surface contact with the plate surface of the insert 300 with a large contact area. It is worth noting that the base 204 and the clamping operation structure 103 are attached to the plate surfaces on opposite sides of the insert 300, thereby clamping the insert 300. Under the clamping action of both, the insert 300 can maintain a stable position within the insert housing 200, preventing the insert 300 from shaking.

[0118] In some examples, the clamping operation structure 103 includes an extension 1032 and a clamping portion 1034, with the extension 1034 initially extending toward the insert 300. The clamping portion 1034 then continues to extend toward the insert 300. The clamping operation structure 103 is attached to the surface of the insert 300 via the clamping portion 1034.

[0119] Furthermore, the clamping operation structure 103 also includes a first connecting portion 1031 and a second connecting portion 1033. The first connecting portion 1031 connects the insert bracket 100 and the extension portion 1032, and the second connecting portion 1033 connects the extension portion 1032 and the clamping portion 1034. Therefore, in the direction in which the clamping operation structure 103 extends toward the insert 300, the physical parts of the clamping operation structure 103 are, in sequence: the first connecting portion 1031, the extension portion 1032, the second connecting portion 1033, and the clamping portion 1034.

[0120] The first connecting part 1031 achieves a smooth transition between the insert bracket 100 and the extension part 1032. Specifically, the first connecting part 1031 is formed into an arc shape and achieves a bend of about 90° in the extension part 1032, ensuring that the extension part 1032 can extend in the direction of the insert 300.

[0121] Meanwhile, the second connecting portion 1033 achieves a smooth transition between the extension portion 1032 and the clamping portion 1034, and the extension directions of the extension portion 1032 and the clamping portion 1034 are approximately the same, that is, the extension portion 1032 and the clamping portion 1034 are approximately parallel. The portion of the second connecting portion 1033 used to connect the extension portion 1032 is formed into an arc shape, and the portion of the second connecting portion 1033 used to connect the clamping portion 1034 is also formed into an arc shape. The two arc shapes are connected to each other to form the second connecting portion 1033.

[0122] It is understandable that both the first connecting portion 1031 and the second connecting portion 1033 are formed by bending sheet metal. If the clamping operation structure 103 does not have the extension portion 1032 and the second connecting portion 1033, and only has the clamping portion 1034 and the first connecting portion 1031, the distance between the clamping portion 1034 and the housing bracket 100 is small, making it impossible to guarantee that the housing bracket 100 has sufficient space for the first connecting portion 1031, which presents processing difficulties. Therefore, the clamping operation structure 103 needs to have the second connecting portion 1033 and the extension portion 1032.

[0123] In some examples, the clamping operation structure 103 also includes an operation part 1036, which is also formed as a sheet structure. When the insert bracket 100 is made of a sheet material, and the extension 1032 and the clamping part 1034 are formed by bending the edge portion of the sheet material, the operation part 1036 is further bent on the basis of the clamping part 1034.

[0124] The operating part 1036 functions as a handle, allowing the user to rotate the insert bracket 100 by operating the operating part 1036, facilitating hand operation. Understandably, since the clamping part 1034 is attached to the surface of the insert plate 300, it is difficult for the user to grip the clamping part 1034. Therefore, the operating part 1036 is at a certain angle to the clamping part 1034, providing the lever arm for the rotation of the insert bracket 100 relative to the insert 200, thus facilitating user operation.

[0125] Meanwhile, the third connecting part 1035 achieves a smooth transition between the clamping part 1034 and the operating part 1036. Specifically, the third connecting part 1035 is formed into an arc shape and achieves a 90° bend in the operating part 1036, that is, the angle between the operating part 1036 and the clamping part 1034 is about 90°, and the operating part 1036 extends in a direction away from the insert 300.

[0126] In some examples, the bending angle of the first connecting portion 1031 defines the overall extension direction of the clamping operation structure 103, ensuring that the clamping portion 1034 can fit against the plate surface of the insert 300. Therefore, it is necessary to ensure the structural strength of the first connecting portion 1031 to maintain its bending angle. On the one hand, the plates used for the insert bracket 100 and the first connecting portion 1031 need to be made of materials with certain structural strength; on the other hand, the surface of the first connecting portion 1031 is reinforced with reinforcing grooves 1037 to enhance its structural strength.

[0127] Specifically, the first connecting portion 1031 has a concave shape at the location of the reinforcing groove 1037, and the concave portion of the reinforcing groove 1037 forms an inclined structure connecting the extension portion 1032 and the insert bracket 100. Therefore, the concave portion of the reinforcing groove 1037 functions as a reinforcing rib connecting the extension portion 1032 and the insert bracket 100, thereby improving the structural strength of the first connecting portion 1031 and ensuring that the overall extension direction of the clamping operation portion 1036 remains constant.

[0128] This application provides a seating fixture, which includes a backrest, a seat frame, and the aforementioned backrest insert locking device.

[0129] In this backrest insert locking device, the insert 200 is connected to the backrest by being inserted into it, while the insert 300 is connected to the seat frame. The insert 300 is connected to the insert 200 by being plugged in, so that the backrest insert locking device is integrated into a whole, thereby ensuring the connection between the backrest and the seat frame.

[0130] In actual implementation, before the insert 300 is inserted into the housing 200, the housing bracket 100 rotates in the reverse direction to its limit position, causing the snap-fit ​​structure 101 to disengage from the first groove 301 and the embedding structure 102 to disengage from the second groove 302, thus clearing the insertion channel for the insert 300 to enter the housing 200. Once the insert 300 is fully inserted into the housing 200, the housing bracket 100 rotates in the forward direction to its limit position, causing the side edge of the snap-fit ​​structure 101 to abut against the bottom of the first groove 301 and the plate surface of the embedding structure 102 to abut against the bottom of the second groove 302, thus locking the positions of the housing 200 and the insert 300 and preventing them from separating, i.e., preventing accidental separation of the backrest and seat frame. Similarly, when the user needs to disassemble the backrest and seat frame, rotating the housing bracket 100 in the reverse direction to its limit position releases the position lock of the housing 200 and the insert 300, facilitating user operation.

[0131] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A backrest insert locking device, characterized in that, include: A insert housing for connecting the backrest; A housing support, which is hinged to the housing, and the housing support is provided with a snap-fit ​​structure; The insert is used to connect the seat frame. The insert is inserted into the insert shell. The insert has a first groove. The insert shell bracket rotates to drive the snap-fit ​​structure to insert into the first groove to lock the position of the insert shell and the insert.

2. The backrest insert locking device according to claim 1, characterized in that, The insert bracket has an embedding structure, and the insert piece has a second groove. The insert bracket rotates to drive the embedding structure into the second groove to lock the position of the insert and the insert piece.

3. The backrest insert locking device according to claim 2, characterized in that, The insert bracket is provided with a limiting structure that extends toward the insert; when the limiting structure rotates and comes into contact with the insert, the snap-fit ​​structure disengages from the first groove and the embedding structure disengages from the second groove; when there is a gap between the limiting structure and the insert, the snap-fit ​​structure is inserted into the first groove and the embedding structure is embedded into the second groove.

4. The backrest insert locking device according to claim 3, characterized in that, The insert shell is provided with a first limiting post, and the insert shell bracket is provided with a first limiting groove, the first limiting post sliding within the range of the first limiting groove; and / or, the insert shell is provided with a second limiting groove, and the insert shell bracket is provided with a second limiting post, the second limiting post sliding within the range of the second limiting groove.

5. The backrest insert locking device according to claim 2, characterized in that, The insert bracket includes a hinge portion, a transition portion, and a locking portion. The hinge portion is hinged to the insert shell. The embedded structure is an embedded plate bent at the edge of the locking portion. The transition portion is used to connect the hinge portion and the locking portion. The width dimension of the transition portion gradually increases in the direction away from the hinge portion to increase the width dimension of the locking portion.

6. The backrest insert locking device according to claim 5, characterized in that, The snap-fit ​​structure is a snap-fit ​​plate, which is bent at the end of the locking part.

7. The backrest insert locking device according to claim 1, characterized in that, The insert housing has a hinge structure extending to the outside, and the insert housing support and the hinge structure are hinged together by rivets.

8. The backrest insert locking device according to claim 7, characterized in that, The rivet can apply a preload to the hinge structure and the insert bracket to limit the rotational torque of the insert bracket to more than 20N.

9. The backrest insert locking device according to claim 7, characterized in that, A gasket is provided between the hinge structure and the insert bracket, and the sum of the thicknesses of the hinge structure and the gasket is less than the thickness of the insert.

10. The backrest insert locking device according to claim 5, characterized in that, The insert includes a base and a bent portion disposed on the edge of the base. The bent portion forms a slot by bending, and the insert piece is inserted into the insert through the slot. The base is attached to the surface of the insert piece. The edge of the bent portion forms an inclined guide portion by bending.

11. The backrest insert locking device according to claim 10, characterized in that, The insert bracket is provided with a clamping operation structure, which is attached to the surface of the insert piece, and the clamping operation structure and the base clamp the insert piece.

12. The backrest insert locking device according to claim 11, characterized in that, The clamping operation structure includes a first connecting part, an extension part, a second connecting part, and a clamping part connected in sequence. The extension part and the clamping part both extend in the direction of the insert, and the clamping part is attached to the surface of the insert.

13. The backrest insert locking device according to claim 12, characterized in that, The clamping operation structure further includes a third connecting part and an operating part. The operating part is connected to the clamping part through the third connecting part, and the operating part extends in a direction away from the insert.

14. The backrest insert locking device according to claim 12, characterized in that, The surface of the first connecting part is provided with a reinforcing groove, and the first connecting part is recessed at the position of the reinforcing groove.

15. A seating arrangement, characterized in that, It includes a backrest, a seat frame, and a backrest insert locking device as described in any one of claims 1 to 14, wherein the backrest is connected to the seat frame via the backrest insert locking device.

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